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E36 (1991 - 1999) The E36 chassis 3-Series BMW was a huge hit among driving enthusiasts from the first moment the car hit the pavement. The E36 won numerous awards over the years it was produced and is still a favorite of many BMW enthusiasts to this day! -- View the E36 Wiki

Uploading fuel pressure video now. It was quite strange, key on is around 30psi unless I turn the key on and off, then it goes all the way up to 80psi, wtf?

Also, I found a big vacuum line that goes to the throttle body elbow was disconnected.

Now it will idle sometimes high, sometimes low. Mind you this is with the airbox completely off, Maf disconnected, etc. Another note, I think it's flooding itself. I can start it and let it idle a few times but when it dies I sometimes cannot start it for a few minutes.

never used a digital read out pressure head, so i do not know how they operate other than resistance through a pressure sensor. not a big fan of that, really....

anyway, the vac leak will be a big factor at both the fpr and the other elbow. fix them and plug everything back in.

is the fpr wet at the vac nipple?? if so, replace the fpr. but most pfr fail and puch the fuel pressure higher on bmw's from my experience. not that they don't also leak, but if not leaky and fuel pressure out of spec up high, it would be my first suspect.

never used a digital read out pressure head, so i do not know how they operate other than resistance through a pressure sensor. not a big fan of that, really....

anyway, the vac leak will be a big factor at both the fpr and the other elbow. fix them and plug everything back in.

is the fpr wet at the vac nipple?? if so, replace the fpr. but most pfr fail and puch the fuel pressure higher on bmw's from my experience. not that they don't also leak, but if not leaky and fuel pressure out of spec up high, it would be my first suspect.

as for teh footwear.....

i forget, have you looked at the plugs??

cleaned the throttle plate, iac??

df

Thanks for all the help DF!!

Fixed both Vac lines, and started it. Again it would idle for different measurements of time lol. One time would start with a higher idle and go down. Next time would be a little lower idle. Both times it died. Like before after a few turns of this I cannot start it, guessing it's still flooding itself.

Tomorrow I'm going to try another fuel pressure gauge if I can get my hands on one. Either way it's still weird for it to keep building pressure as I turn the key on and off, like the pump is dying but Idk.

FPR was not wet that I noticed, I have been leaning towards that being an issue though. Any way to test it?

Another note for tomorrow, going to try cleaning the MAF. What's the best/easiest way to check for vac leaks? Where is the iac? Haven't cleaned anything yet.

Also, no on the plugs, I should have pulled them as I suspect they were pretty wet. I bought new ones today. Tomorrow should be more conclusive.

there is an adjustment plug near the hinge, iirc...been a looooong time since i have messed with the barn doors. they're a coil spring resistance design, and the coil can become stressed a bit and not read correctly, hence the adjustment. or you could 're-wind' the spring, but that's too much like work....)

the iac looks (or should) the same as on the e36. this could be giving you some funky idle issues, so i would clean that first.

Took the AFM (MAF, whatever lol) apart to try and clean it to no avail. Here is the video with a better meter, don't pay attention to my friends in the background lol. I move the door open slowly as I did before.

Took the AFM (MAF, whatever lol) apart to try and clean it to no avail. Here is the video with a better meter, don't pay attention to my friends in the background lol. I move the door open slowly as I did before.

man i think that thing is shot. it's pretty inconsistant and jumpy, granted it could be the leads on the meter, but still... a used AFM from a junk E30 could be worth a shot.

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Quote:

Originally Posted by Los

^He's been drinking beer and destroying pumpkins with brake rotors and sledge hammers.